claudine isaac, head of the clinical breast cancer program, at med star georgetown university hospital, thinksni there are also risks to getting too much treatment. he >> the risk of causing anxiety due to false positive screens, causing unnecessary procedures, like biopsies, but i think the one that doesn't get play is tho risk of overdiagnosis, which iss incumbent upon those of us in the scientific and medical community is to try and figure out which cancers are going toif cause problems and which cancers are not.ch and we're not quite there yet.y but we clearly have a job to do, and i think we're well on the way to at least trying to answer that question. we're not there yet. >> reporter: and until that day comes, women have littlee recourse other than to read all they can on the subject and discuss it with a medical professional whose judgment they trust.tmo >> there is much more on this story online, where you can find a breakdown of the debate and the data on mammograms and get commentary with scientific evidence from three leading physicians.ah to our second health story,me what